Date Code 20010521
Event Reports and Sequential Events Reporting
9-1
SEL-387E Instruction Manual
SECTION 9: EVENT REPORTS AND SEQUENTIAL EVENTS
REPORTING
I
NTRODUCTION
The SEL-387E Relay offers two styles of event reports:
Standard 15-, 29-, or 60-cycle event reports
Sequential Events Recorder (SER) report
These event reports contain date, time, current, relay element, optoisolated input, and output
contact information.
The relay generates (triggers) standard 15-, 29-, or 60-cycle event reports by fixed and
programmable conditions. These reports show information for 15, 29, or 60 continuous cycles
depending on the Global setting LER. The length of the pre-fault data contained in the event
report is determined by the Global setting PRE. This setting allows for 1 to (LER-1) cycles of
pre-fault data in each event report. The number of event reports stored in nonvolatile memory
depends on the LER setting as follows:
LER
Number of Event Reports Saved
15 18–21
29 12–14
60 7
The number of events saved will be fewer if mixed lengths (e.g., LER = 60 for three event
reports and then changed to LER = 29) are stored together or if the relay is subjected to frequent
power-down/power-up cycles.
If the relay nonvolatile memory is full and another event is triggered, the latest event report will
overwrite the oldest event report, and the oldest event report will be lost. See Figure 9.2 for an
example standard 15-cycle event report.
The relay adds lines in the Sequential Events Recorder (SER) report by programmable
conditions only. The SER lists date and time-stamped lines of information each time a
programmed condition changes state. The relay stores the latest 512 lines of the SER report in
nonvolatile memory. If the report fills up, newer rows overwrite the oldest rows in the report.
See Figure 9.8 for an example SER report.
S
TANDARD
15-, 29-,
OR
60-C
YCLE
E
VENT
R
EPORTS
Event Report Length (Settings LER and PRE)
The SEL-387E Relay provides user-programmable event report length and pre-fault length.
Event report length is set at 15, 29, or 60 cycles, using the Global setting LER. Pre-fault length
ranges from 1 to (LER-1) cycles. Set the pre-fault length with the Global setting PRE. The LER
and PRE settings are accessible either via the
SET G
serial port command, or via the
SET/GLOBAL front-panel pushbuttons.
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